Question

скорость велосипедиста 15 км/ч а скорость пешехода на 9 7 км/ч меньше. на сколько уменьшится расстояние между ними за 1 час ,если они движутся навстречу друг другу? на сколько увеличивается расстояние между ними за1 час,если они движутся из одной точки в противоположенные стороны?

Answer 1

Велосипедист - 15 км/ч
пешеход - 15 - 9,7 = 5,3 км/ч
(15 + 5,3) * 1 = 20,3 км уменьшится, если на встречу друг другу
(15 + 5,3) * 1 = 20,3 км увеличится, если в противоположные

Answer 2

Calculation of Distance Reduction and Increase

To calculate the reduction in distance between the cyclist and the pedestrian when they are moving towards each other, we need to find the relative speed between them. The relative speed is the sum of their individual speeds.

Given: - Speed of the cyclist = 15 km/h - Speed of the pedestrian = 9.7 km/h

To find the relative speed, we add the speeds of the cyclist and the pedestrian:

Relative speed = Speed of the cyclist + Speed of the pedestrian

Relative speed = 15 km/h + 9.7 km/h

Relative speed = 24.7 km/h

Now, to find the reduction in distance, we multiply the relative speed by the time they are moving towards each other. In this case, the time is 1 hour.

Reduction in distance = Relative speed * Time

Reduction in distance = 24.7 km/h * 1 hour

Reduction in distance = 24.7 km

Therefore, the distance between the cyclist and the pedestrian will be reduced by 24.7 kilometers in 1 hour when they are moving towards each other.

Now, let's calculate the increase in distance between the cyclist and the pedestrian when they are moving in opposite directions (from the same starting point to opposite sides).

To find the increase in distance, we multiply the sum of their speeds by the time they are moving in opposite directions. Again, the time is 1 hour.

Increase in distance = (Speed of the cyclist + Speed of the pedestrian) * Time

Increase in distance = (15 km/h + 9.7 km/h) * 1 hour

Increase in distance = 24.7 km/h * 1 hour

Increase in distance = 24.7 km

Therefore, the distance between the cyclist and the pedestrian will increase by 24.7 kilometers in 1 hour when they are moving in opposite directions from the same starting point.

Please note that these calculations assume constant speeds for both the cyclist and the pedestrian throughout the entire duration of their movement.